What do the states mean?+
- Solid: well studied, and it works.
- Half-there: the science is still forming.
- A ghost: almost no real studies.
- Hollow: well studied, and it does not work.
- A cord: the pair itself has been tested together.
- Air: nobody has ever tested this pair.
The full scoring method: How we score
NMN benefits: where the science stands
For blood sugar: not settled yet.
Blood sugar is what most people take NMN for, and the strongest evidence says it does not help: a combined review covering 15 trials found no real difference. As of August 2026, the verdicts on this page rest on evidence from 35 trials, drawn from the strongest research among the 173 papers on PubMed that mention NMN. Every claim is checked below.
173 papers on PubMed · evidence from 35 trials
Claim by claim
- Blood sugarThe science is still forming. No real difference found so far.
- Blood pressureThe science is still forming. Results lean positive, but there is not much yet.
- Strength and powerThe science is still forming. The best studies disagree.
Pairs people ask about
The four sources we read
- 2025Meta-analysis · no clear effect on strength and powersource
- 2025Meta-analysis · pools 9 trials, 412 people · small benefit for strength and powersource
- 2026Meta-analysis · pools 15 trials · no clear effect on blood sugarsource
- 2026Meta-analysis · pools 10 trials, 349 people · small benefit for blood pressuresource
Chosen as the strongest evidence out of 173 papers on PubMed. Every row links to its paper.
Fair questions
Does NMN work?+
For blood sugar, it is not settled. No real difference found so far.
Is NMN safe?+
No caution is recorded on this page. That is not a safety guarantee; the studies we read were not safety trials.
Why only 4 sources, when PubMed lists 173?+
The 173 is every paper that mentions NMN in any way: animal studies, blood measurements, papers where it is a side note. The strongest sources are combined reviews, and each one already gathers every trial its authors could find. Our 4 cover 35 trials between them, and every one is linked above. Both counts are measured, not estimated.